// Oprogramowanie Roman Ryltsov
This post is starting a step by step tutorial on writing a simple DirectShow filter using a simplified DirectX Media Objects (DMO) API. From the very scratch, the goal is to make a DirectShow/DMO video processing filter which implements video brightness and contrast correction. DirectX Media Objects are COM-based components. To implement a COM object…
Surprisingly fast I got new problems having ffdshow installed as a part of K-Lite Codec Pack. No wonder though because let us take a look at registration information: Display Name: @device:sw:{083863F1-70DE-11D0-BD40-00A0C911CE86}\{0F40E1E5-4F79-4988-B1A9-CC98794E6B55} CLSID: {0F40E1E5-4F79-4988-B1A9-CC98794E6B55} Friendly Name: ffdshow Audio Decoder Path: C:\Program Files\K-Lite Codec Pack\ffdshow\ffdshow.ax Merit: 0x3fffffff Nice merit, ain’t it? What is merit anyway? Let us…
It appears that ATL does not center window correctly on multi-monitor systems. ATL code checks screen work area coordinates in CWindow::CenterWindow to ensure new position is within visible area, however since SystemParametersInfo/SPI_GETWORKAREA is used target rectangle is always on a primary monitor. This hotfix works the problem around:
Another weird bug from Visual C++ .NET/ATL internals (Visual Studio .NET 2003 Service Pack 1). IDispatch implementation (IModuleCommunicationTcp on the screenshot) supplied by Visual C++ compiler that converts “by DISPID” IDispatch::Invoke call into virtual method call (IModuleCommunicationTcp::get_HttpHost) does not initialize local BSTR variable i1 on stack. In case of method failure (in which case there…
There has been an unexpected problem localizing application resources when STRING resources failed to load while there were no problems with other resource types. The source of the problem appears to be within ATL core. As long as CP_THREAD_ACP is involved in ATL’s conversion the loaded string is screwed. The problem is illustrated by the…